US3834485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic speaker system
Assignee: Individual
•
Filing: 1973-10-01
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Granted: 1974-09-10
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Expires: 1993-10-01
Abstract
Abstract An acoustic speaker system is provided having a substantially air-tight speaker enclosure without uninterrupted parallel interior surfaces, said enclosure having a length to width ratio greater than 3 and preferably between 4 and 5. Dampening means are provided to reduce and disperse resonant vibrations of the enclosure. Low frequency, middle frequency and high frequency loudspeakers are rigidly and angularly mounted on an end portion of the enclosure in substantially parallel relation, preferably at an angle between 35* and 55* to an associated compound corner of a listening room. The middle and high frequency speakers are both preferably back enclosed and are positioned exteriorly of the low frequency speaker on stand-off supports, with the middle frequency speaker preferably positioned between the low and high frequency speakers. The speakers are positioned with the enclosure so that they are all capable of forwardly radiating into a closely spaced compound corner preferably between 1 1/2 and 5 feet from the low frequency speaker and the low frequency speaker is capable of backwardly radiating into the enclosure. Cross-over means are also provided for selectively directing the electrical signals according to their frequency to the low frequency, middle frequency and high frequency speakers, respectively.
Inventors
- 👤 A Doschek
- 👤 M Doschek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:14
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/26; G; G10; G10K; G10K11/00; G10K11/002
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
242 words
An acoustic speaker system comprising: A. a speaker enclosure having a length to width ratio greater than 3, said enclosure of stiff side panels and first and second end portions and being substantially air-tight, said side panels being arranged without uninterrupted parallel interior surfaces, said first end portion being substantially closed, and said second end portion having interior surfaces non-parallel to the interior surfaces of said first end portion adapted to rigidly mount speakers; B. dampening means within the enclosure for reducing and dispersing mechanical and acoustical resonant vibrations of the enclosure; C. a low frequency speaker rigidly and angularly mounted on and substantially hermetically sealed to said second end portion of the enclosure, and capable of forwardly radiating into a relatively closely spaced compound corner and capable of backwardly radiating into the enclosure; D. a high frequency speaker rigidly and angularly mounted at said second end portion substantially parllel to and spaced exteriorly from and off-axis from the low frequency speaker on stand-off supports and capable of frontwardly radiating into said compouNd corner; E. a middle frequency back-enclosed conical speaker rigidly and angularly mounted at said second end portion substantially parallel to and spaced between and off-axis from the low and high frequency speakers on stand-off supports and capable of frontwardly radiating into said compound corner; and F. a cross-over means for selectively directing the electrical signals according to their frequency to the low frequency, midfrequency and high frequency speakers respectively.
Claim 2
Dependent Claim
242 words
An acoustic speaker system comprising: A. a speaker enclosure having a length to width ratio greater than 3, said enclosure of stiff side panels and first and second end portions and being substantially air-tight, said side panels being arranged without uninterrupted parallel interior surfaces, said first end portion being substantially closed, and said second end portion having interior surfaces non-parallel to the interior surfaces of said first end portion adapted to rigidly mount speakers; B. dampening means within the enclosure for reducing and dispersing mechanical and acoustical resonant vibrations of the enclosure; C. a low frequency speaker rigidly and angularly mounted on and substantially hermetically sealed to said second end portion of the enclosure, and capable of forwardly radiating into a relatively closely spaced compound corner and capable of backwardly radiating into the enclosure; D. a high frequency speaker rigidly and angularly mounted at said second end portion substantially parllel to and spaced exteriorly from and off-axis from the low frequency speaker on stand-off supports and capable of frontwardly radiating into said compouNd corner; E. a middle frequency back-enclosed conical speaker rigidly and angularly mounted at said second end portion substantially parallel to and spaced between and off-axis from the low and high frequency speakers on stand-off supports and capable of frontwardly radiating into said compound corner; and F. a cross-over means for selectively directing the electrical signals according to their frequency to the low frequency, midfrequency and high frequency speakers respectively.
Claim 3
Dependent Claim
14 words
said speakers are positioned at angles between 35* and 55* to said compound corner.
Claim 4
Dependent Claim
14 words
said speakers are positioned at angles between 35* and 55* to said compound corner.
Claim 5
Dependent Claim
14 words
said middle and high frequency speakers are symmetrically positioned relative to said compound corner.
Claim 6
Dependent Claim
14 words
said middle and high frequency speakers are symmetrically positioned relative to said compound corner.
Claim 7
Dependent Claim
10 words
An acoustic speaker system as claimed in claim 1 wherein:
Claim 8
Dependent Claim
10 words
An acoustic speaker system as claimed in claim 1 wherein:
Claim 9
Dependent Claim
20 words
said enclosure is supported on legs, said legs capable of transmitting mass vibrations from the enclosure to a supporting base.
Claim 10
Dependent Claim
20 words
said enclosure is supported on legs, said legs capable of transmitting mass vibrations from the enclosure to a supporting base.
Claim 11
Dependent Claim
10 words
An acoustic speaker system as claimed in claim 3 wherein:
Claim 12
Dependent Claim
24 words
An acoustic speaker system as claimed in claim 1 wherein: said enclosure is pentagonal in shape and capable of nesting with a supporting corner.
Claim 13
Dependent Claim
37 words
An acoustic speaker system as claimed in claim 1 wherein: said cross-over means selectively changes inputs from one speaker to another speaker at a frequency range where the efficiency of the lower frequency speaker is relatively high.
Claim 14
Dependent Claim
27 words
An acoustic speaker system as claimed in claim 1 wherein: the low frequency speaker is spaced between about 1 1/2 and 5 feet from the compound corner.
Claim 15
Dependent Claim
24 words
An acoustic speaker system as claimed in claim 1 wherein: the length to width ratio of the speaker enclosure is between 4 and 5.
Claim 16
Dependent Claim
60 words
An acoustic speaker system as claimed in claim 1 wherein: the dampening means includes an asymmetric bracing means positioned on the exterior surface of at least some of the side panels of the enclosure to reduce and disperse the vibrational modes of the side panels, and absorption means within the enclosure to reduce and disperse volume resonance within the enclosure.
Claim 17
Dependent Claim
29 words
An acoustic speaker system as claimed in claim 1 wherein: the low frequency speaker is mounted to said second end portion tangentially adjacent the side panels of the enclosure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |